Air-hammer attachment



A. VERDESCA. MR HAMMER ATTACHMENT. APPLICATION FILED JULY 8,1918.

1,344,523. PatentedJune 22; 1920.

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ARTHUR VEBDESCA, 02E WEST NEW YORK, NEW JERSEY.

AIR-HAMMER ATTACHMENT.

s fii of Letters Patent. Patented June 22, 1920.

Application filed July 8, 1918. Serial No. 243,876.

To all whom it may concern:

Be it known that I, ARTHUR 'VnnnnsoA, a citizen of the United States, residing at West New York, in the county of Hudson, State of New Jersey, have invented certain new and useful Improvements in Air-Hammer Attachments; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it apper-ta-i-ns to make and use the same.

The invention relates to a j ack hammer attachment and more particularly to the class of drill hole cleaning attachments for compressed air hammers.

The primary object of the invention is the provision of an attachment of this character wherein the exhaust from the compressed air hammer may be directed into the drill hole for the removal of the cuttings therefrom while the hammer is in operation, the attachment being of novel form and controlled by the operator of the harm mer.

Another object of the invention is the provision of an attachment of this character wherein the air discharge nozzle thereof is readily detachable to permit the changing of drills in the hammer when the occasionrequires, the connection of the nozzle being at a point opposite the chuck which holds the drill so that the removal of the nozzle leaves the operator free access to such chuck.

A further object of the invention is the provision of an attachment of this character whi h is extremely simple in construction, readily and easily applied to and removed from the compressed air hammer, thoroughly reliable and eiiicient in its operation, and inexpensive to manufacture.

. lVith these and other objects in view the invention consists in the features of construction. combination and arrangements of parts as will be hereinafter fully described. illustrated in the accompanying drawing and pointed out in the claim hereunto appended. V In the accompanying drawing:

Figure 1 is an elevation of a compressed air hammer showing the attachment constructed in accordance with the invention applied thereto.

Fig. 2 is a side elevation.

Fig. 3 is a fragmentary elevation of the upper portion of the attachment showing the lower portion or .the air discharge nozzle detached.

Fig. 4 is an elevation of the air discharge nozzle uncoupled from the upper portion of the attachment.

Fig. 5 is a vertical longitudinal sectional view through the attachment.

Fig. '6 is a sectional view of the line 6-6 of Fig.

F 7, is a plan view of the coupling end of the air discharge nozzle of the attac'lr ment.

Fig. 8 is a plan view of the coupling end of the upper portion of the attachment.

Similar reference characters indicate corresponding parts throughout the several views in the drawings.

Referring to the drawings in detail, A designates generally the compressed air motor, commonly known as thejack ham mer, having the usual air exhaust nipple 13 extending laterally at right-angles to the cylinder of the hammer, the latter being merely shown to illustrate the application and the use of the attachment thereinafter fully described.

The attachment comprises an elbow union 10 which is tapped or otherwise engaged in the exhaust nipple B and turned downward, the T-shaped casing 11 of a three-way valve having a handle 13 and a lateral outlet 12 to the atmosphere, and. a short pipe section 14 secured to the lower end of the valve casing and extending alongside the motor a slight distance to one side thereof as best seen in Fig. 1. This pipe section carries at its lower end a. male coupling head 15 for detachable engagement with a female or socket head 16 on the upper end of the air discharge nozzle 17, which is formed with a bend 18 therein to provide an offset discharge end 19 which is adapted to extend parallel with, and in close relation to, the drill 20 of the compressed air hammer, the nozzle 17 being of the proper length to bring its end 19 into close proximity to the cutting end of the drill. The latter is connected at its upper end by a chuck with the hammer within the motor, not necessary to describe in detail, but attention is invited to the fact that said coupling heads stand about opposite this chuck so that, when the nozzle and its head are removed, the operator has free access to the drill for the insertion or the removal of the same.

Formed on the male coupling head 15 are nozzle is detachably locked to the pipe section 1 1 of the attachment.

Surrounding the pipe section Ll between the male coupling head 15 and the follower plate is a coiled expansion spring 27 which serves to move the plate in a direction fon closing the jaws in locking position. Formed on or secured to the male coupling head 15 is a post or upright 28 to which is pivotally connected a forked cam lever 29, the cam arms 30 of which pass astride the pipe 14 and bear upon the follower plate 25,

and on swinging the lever 29 in one direction the plate is moved against the resistance'of the spring 27 for the releasing of the jaws 22 from locked position with the follower plate, the lever 29 being normally raised and in contact with the upper pipe section 14 under the action of the spring 27 so that the jaws 22 will be in locking position.

The male coupling head 15 is formed with a reduced mouth 31 about which is a washer 32 and this month edge enters a socket within the female head 16 while the washer forms an air tight joint between the coupling heads when joined with each other.

In the use of the attachment the exhaust air from the hammer A is directed through the pipe section 14 into the nozzle 17, whence it is discharged from the offset end'19 into the drill holeto clean and 'free said hole from' cuttings, dirt and other 'matter collected therein when the drill 20 is operated by the hammer A in the use thereof.

When it is desired to free the air from the attachment, the cock is set so that the air will discharge from the outlet 12, and also by setting the cock the air can be regulated for the control-of the attachment. lt will appear that the nozzle 17 canbe quickly detached when it is desired to remove the drill 20 or change one drill for another as the occasion may require.

From the foregoing it is thought that the construction and the manner of operation of the attachment in connection with the hammer will be clearly understood and therefore a more extensive explanation has been omitted.

What is claimed is: o

The herein described attachment for a drill driven by an air motor having a lateral exhaust, the same comprising an elbow adapted for connection With said exhaust, a three-way valve whose casing is carried by the elbow, a pipe section carried by said casing and extending alongside the motor, an air discharge nozzle adapted to be inserted in the tool hole alongsidethe drill and having its upper end deflected laterally, and detachable coupling means between said upper end and thelower end of said pipe section at a point opposite the upper end of the drill.

In testimony whereof I affix my signature in the presence of two witnesses.

ARTHUR VERDESCA. l/Vitnesses:

M. llIODlARELLI, DouINIcK MAINILRI. 

